Engineering :: Heat Engines

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301.

Dissociation is

A.	Same is combustion	B.	Process of heat liberation in which no flame exist
C.	Slow combustion	D.	Smokeless combustion
E.	Combustion without heat

302.

A rope brake dynamometer falls under the category of

A.	Mechanical friction type dynamometer	B.	Hydraulic dynamometer
C.	Transmission type dynamometer	D.	Torsion type dynamometer
E.	Electrical type dynamometer

303.

Prony brakes are used for testing

304.

As per IS specifications the endurance test for engines is conducted for

305.

More test is conducted on

306.

Brayton cycle cannot be used in reciprocating engines even for same compression rations and work output because

A.	Otto cycle is more efficient	B.	Brayton cycle is less efficient
C.	Brayton cycle is for slow speed engines only	D.	Brayton cycle requires large air-fuel ratio
E.	Large volume at low pressure cannot be efficiently harded in reciprocating engines

307.

In aircraft using gas turbine the cycle used is

A.	Simple	B.	Regeneration
C.	Reheating	D.	Reheating with regeneration
E.	Multi-stage expansion with reheating and regeneration

308.

For same heat input and same compression ratio

A.	Otto cycle and Diesel cycle are equally efficient	B.	Otto cycle is less efficient than Diesel cycle
C.	Otto cycle is more efficient than Diesel cycle	D.	Efficiency depends mainly on working substance
E.	None of the above

309.

Anthydrous substance is

A.	Free of hydrogen	B.	Free of water specially water of crystallization
C.	Free of humidity	D.	Dry substance
E.	Crystalline substance

310.

Air fuel ratio for a jet engine is of the order of